7 DD filter
7.1 Maintenance
When maintaining the filter, keep in mind the following:
• On filters with manual drain valve, open the latter at regular intervals to evacuate collected dust or liquid
• Change the filter element yearly or when the pressure drop reaches approx. 0.35 bar
• In case an automatic drain valve is installed, manual draining can be carried out by turning the connection
nipple of the automatic drain valve counterclockwise.
•
When the filter has to process air with a temperature higher than the specified maximum
temperature, the filter's lifetime will be reduced considerably!
7.2 Filter element change
Procedure
When maintaining the filter, keep in mind the following:
1. Isolate the filter from the air net.
2. Depressurize the filter by turning the connection nipple of the automatic drain valve counterclockwise or
by opening the manual drain valve.
3. Unscrew the bowl. A whistling noise will warn you if the bowl is not fully depressurized. If this occurs,
the bowl should be screwed back and the venting should be repeated.
4. Discard the old filter element.
5. Remove the O-ring from the bowl and clean the bowl with isopropanol. Cleaning cloths of Kimtech are
recommended. Position a new O-ring on the bowl.
6. Open the sealed bag at the topcap side of the filter cartridge.
7. Take the cartridge and lower the plastic until the middle of the cartridge.
8. Position the cartridge under the filter head and push it in place. Only touch the plactic bag. Avoid contact
of the filter cartridge with the hands.
Instruction book
2920 1728 05 133
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